A nice set of aluminum clad wood French doors would certainly be a nice choice if you're in the market to update your doors. French doors with aluminum clad wood construction are great since they are durable and sturdy. You can find a wide range of doors with clad wood and aluminum in various designs, and French models are just an example. The clad method of doing construction is a good way of reinforcing the door and making it stronger. If you're looking for a very sturdy door that will look good even after years of use, then there are many brands to check out such as Andersen, Larson and Therma Thru to mention a few. Some of these doors are a bit more decorative, however all of them are energy efficient and should be able to lower your energy bill if you have inefficient doors right now. Home Depot and Lowes are definitely worth checking out if you're in the market for new doors since their selection is wide and their prices are reasonable and affordable. 
West Palm 72"W Clear Aluminum French Patio Door
"Low maintenance. Prefinished. 1 year warranty. Meets or exceeds the requirements of the Florida Window and Door Code" 
Frost King Wood & Vinyl Clad Foam Door Sets with Stop
"Wood & Vinyl clad foam door sets can be nailed in place around wood framed doors, then stained or painted to match the décor. Can be installed on the door stop or can be used to replace the door stop. Provide effective weathersealing and cushioning. Vinyl Insert" Available at lowes.com
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